PROGRAM
ON LINE
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TECHNICAL
TUTORIAL APRIL 10, 2001
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MORNING SESSION
Optical Networks: new network technologies in
the access and in the metro area
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By Maurice GAGNAIRE,
Associate Professor,
Ecole Nationale Supérieure des Télécommunications, Paris, France
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During these last ten years, fundamental advances
have been obtained in the field of new opto-electronic devices. Such
advances added to the benefits of the WDM (Wavelength Division Multiplexing
) makes the concept of all-optical networking a reality. If today
there is no doubt about the commercial future of all-optical technologies
in core networks, the suitability of these techniques in the access
and in the metro remains very discussed. This tutorial aims at presenting
a state of the art of these evolutions.
09.00 Welcome and registration
09.30
1. Introduction
- What are the limits and drawbacks of actual IP and ATM over SDH
networks.
- The concept of all-optical networking: definition, objectives, challenges.
- From the overlay approach to the peer-to-peer approach: a challenge
for the next ten years.
2. Optical Access Networks
An overview of the various technologies: xDSL, HFC, PON, WITL etc..
The limits of xDSL technologies.
The FSAN initiative for fiber-in-the-loop (FITL).
The PON technology.
The physical layer.
Which MAC protocol for PON systems ?
The ITU-T G.983 frame.
The SuperPON technology.
The physical layer.
Why WDM is mandatory for SuperPON MAC protocols.
Which application for SuperPON systems ?
10.30
Coffee break
11.00
3. Optical Metropolitan Area Networks
Ring-based topologies.
Star-based topologies.
The OMFT proposal.
A MAC protocol for IP DiffServ oriented optical star.
4. Optical Core Network
All-optical switch/routers : the promises of the MEMS technology.
The Optical Transport Network.
The Digital Wrapper.
The Routing and Wavelength Allocation problem.
Conclusion
12.00 Lunch
Digital Wrapper Presentation
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By
Maarten VISSERS,
consulting member of technical staff within the optical networking
group,
Lucent Technologies |
In 1996, the International Telecommunication Union (ITU-T)
identified the Optical Transport Network (OTN) as the next generation
transmission hierarchy beyond SDH/SONET to support the growing needs
for bandwidth. The Gigabit line signals and associated Megabit path
signals had to be extended into Terabit line capacity and associated
Gigabit path signals. Wavelength Division Multiplexing (WDM) has been
the enabler to make this step.
14.00 Introduction
Initially started as SDH/SONET over WDM line systems, the addition
of cross connects will show the limitations of this initial configuration.
STM-N/OC-N signals are designed as section level signals, not as path
level signals required in the optical transport network. A new path
level signal was needed, which would provide overhead/OAM signals independent
of its client signals.
Optical Channel (OCh) Signal Definition
A path level signal transported via a new section level signal: the
Optical Transport Module (OTM). This multi-wavelength OTM signal can
transport an optical channel signal per wavelength. Optical channel
signals can have bit rates of about 2.5, 10 and 40 Gbit/s at the moment.
Digital Wrapper Concept Introduction
A breakthrough in the specification of the optical channel signal.
The OCh signal consists of two parts: the Optical channel Data Unit
of level k (ODUk, k=1,2,3) and the Optical channel Transport Unit
of level k (OTUk). The ODUk is a digital framed signal consisting
of 4 rows by 3824 columns, with the first 16 columns dedicated to
ODUk overhead. The ODUk is a network wide transport entity, which
is able to transport client signals, for example STM-N, IP, Ethernet
and ATM, in its payload.
15.00 Coffee break
OTUk & ODUk Role Description
The OTUk adapts the ODUk for transport over a specific line system.
Some OTUk signals will be standardised to support the interconnection
of two networks of different operators and/or subnetworks of different
vendors. Other OTUk signals are proprietary and will be deployed in
vendor specific subnetworks only. The OTN will therefore consist of
vendor and/or operator specific OTN subnetworks, interconnected via
standard Optical Transport Module (OTM-0, OTM-nr) Inter Domain Interfaces
(IrDI). The ODUk and OTUk signals provide monitoring capabilities
for every stakeholder in the transport domain: customer, service provider
and network operators. It is as such the first transmission technology
designed for the competitive marketplace, in which the customers can
own the OCh endpoints (and their monitoring capabilities), while there
are still dedicated monitoring capabilities available for service
providers and the group of network operators providing the OCh connections.
Electrical Processing
The electrical processing associated with the transport of ODUk and
OTUk signals will not add additional O/E/O points to the network.
Instead, electrical processing of these signals will be performed
at those locations where already O/E/O conversion is required: e.g.
at network borders and regeneration points defined by the engineering
rules.
New ITU-T Recommendations
A new set of ITU-T recommendations is emerging, specifying all aspects
of this Optical Transport Network: network architecture, structures
and mappings, equipment, network management, protection switching,
physical layer optical parameters, jitter and wander, error performance,
data communication network and switching.
17.00 End of the session
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CONFERENCE
DAY ONE APRIL 11, 2001
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09.00 Welcome and Registration
09.30 Keynote address
By Arun K.Somani, Nicholas Professor of ECpE
Although SONET has played an important role thus far in the design
and operation of a number of networks around the globe, it is fast
approaching its limits. SONET was originally built for transporting
64-kbps voice channel traffic. However, it is not exactly suited for
the efficient transport of Internet related data traffic. In addition,
bandwidth scaling difficulties, quick provisioning and the need for
service differentiation necessitates the need to leverage traditional
SONET/SDH to newer technologies.
Examining some of the issues that need to considered in the evolution
of SONET/SDH to newer network technologies:
Technologies that enable dynamic delivery of bandwidth services.
Technologies that can support data services at multiple data rates.
The ability to satisfy demands for different Quality of Service (QoS)
Technologies that enable IP packets to be injected directly into the
optical ether - IP over WDM.
WDM: photonic switching and coming of the optical Networks.
WDM: developments in service provider networks.
EVOLUTION OF THE SDH/SONET TRANSPORT NETWORK
10.00 The Optical Transport Network (OTN):
From Pure Transmission Issues to Management Services
The Optical Network is evolving from the point-to-point transmission
system to an effective transport layer including networking capabilities.
This evolution is mainly driven by the request of flexibility due
to very high amount of traffic combined with the high traffic variations
in the transport network and permit by the Optical Cross-Connect.
Presenting we will present the different perspectives to introduce
Optical Networking functions and which network architectures could
be proposed. Discussing the management issues and possible management
services. This point is illustrated and argued regarding to the current
standardization work in this area (functions related to the Optical
Channel within G.709 Recommendation in the ITU-T).
Mathieu Garnot, Optical Network Specification Team Leader,
Alcatel Optics Group
10.30 Coffee break
11.00 High bit Rate Sonet/SDH Frames
How will 40 Gbit/s SONET/SDH transport systems be deployed in future
networks?
- What are the benefits of using a 40 Gbit/s framed transport system?
- How does this technology position itself with
DWDM – is it too much, too late?
- What are the technical and operational limits for 40 Gbit/s transmission?
- What network topologies and architectures can be supported by these
products?
- What new functionality will we expect to see on 40 Gbit/s equipment?
How will this help network operators transport
different payloads – for example between large routers?
Jim Everett, SDH Strategist, Marconi
11.30 Beyond Sonet/SDH - a Challenge for Operators
Efficient transport of IP over optics - a theoretical comparison of
the different proposed concepts. Experiments with Packet over SDH,
Gigabit Ethernet and DPT.
An agile server layer supporting multiple clients (ASON).
Using MPlambdaS - an integrated approach to transport IP.
Gigabit Ethernet in the access - LAN technology invades the WAN.
Adam Kapovits, EURESCOM
12.00 Evolution of SONET/SDH Networks to METRO Optical Networks
Describing all current METRO solutions by using valid customer examples
from service providers such as British Telecom, COLT Telecom and VerizonTelecommunications.
METRO optical solutions focusing Storage Networking and IP access.
New Access Networks, xDSL and Wireless local loop currently installed
and challenging Sonet/SDH networks.
PON and other optical solutions including WDM offering future proof
requirements. Speaker:
Ulrich Mohr, ADVA AG Optical Networking, Strategy Director
12.30 Lunch
METROPOLITAN
NETWORKS: USING SONET/SDH OR NOT
14.00 Describing the
Resilient Packet Ring (RPR) Initiative
Presenting the new initiative to create a new MAC layer standard
for resilient packet rings: RPR.
Why are current networking technologies such as SONET/SDH not optimized
to carry IP traffic over Metro MAN?
Can we change the traditional and expensive layered networking model?
Why do we have to compile the benefits of several technologies like
Ethernet, SONET/SDH and IP into one new technology?
What advantages a new MAC will bring to the services providers?
How will RPR change the economics of networking services in the
MAN?
The "All Dynamic, All Packet" approach will revolution the role
of service providers in the MAN.
Can IP applications take easily advantage of RPR features?
How RPR relates to other technologies such as IP, MPLS, DWDM, and
10GE? The "reduced complexity" strategy
Status of IEEE 802.17 standardization and other related bodies
Frederic Thepot, Director EMEA, Dynarc
14.30 An Introduction to Spatial Reuse Protocol
Spatial
Reuse Protocol (SRP) is a layer 2 MAC ring technology with uses
SONET/SDH framing. This technology is used in Metro Area Network
Architecture for the purpose of extending IP services out to the
edge of the network with all the benefits of ring recovery and reliability.
This Resilient Packet Ring technology is described in the Informational
RFC 2892 and is being studied at the IEEE 802.17 Working Group.
Ritch Dusome, Manager Product Marketing, Cisco Systems
MPLS/MPLAMBDAS
15.00 Issues
in MPLS-based Control of SONET/SDH Optical Networks
Examining the issues involved in enabling MPLS control of SONET/SDH
networks. Focusing on properties of SONET/SDH networks, their multiplexing
structure, and their protection options, to highlight the type of
information that needs to be propagated within MPLS routing protocols
so that it may be used in path computation prior to circuit provisioning.
Examining the extensions required in the signaling protocols to
enable circuit provisioning in these networks, highlighting some
new attributes and signal types recently defined in the IETF. Finally,
discussing some future capabilities, such as new protection capabilities
and multilayer circuit setup, that would enable interoperation with
underlying optical networks.
Authors:
Greg Bernstein, Ciena
Vishal Sharma, Jasmine Networks
Eric Mannie, GTS
Ben Mack-Crane, Tellabs
Speaker:
Vishal Sharma, Jasmine
Networks
15.30 Exploring IP Intelligence over an Optical Plane for the
Next Generation Internet
WDM Network Management: the MPLS control plane requires up to date
status info on the physical plant of the network. Automatic provisioning
of light paths.
Dynamic wavelength assignment: For associating MPLS labels with
lambdas, carriers need dynamic assignment capability.
Protection and restoration.
End system identification and network service recovery: In order
to associate IP labels with lambdas, a discovery procedure must
be deployed for the MPLS-capable end systems.
MPLS control channels and signaling protocols: How to distribute
topology state information, monitor physical layer status, allocate/de-allocate
bandwidth between IP layer and Optical layer. Security: Protocols
and procedures must be established to maintain a secure link for
the control channel, in addition to data channels.
It is relatively simple for a potential attacker to gain physical
access to fiber links and carry out service disruption or tapping
attacks.
Authors:
Ashis Khan, VP, Marketing, Maple Optical Systems
and Bill Joll, President & CEO, Maple Optical Systems
Speaker:
Ashis Khan, VP, Marketing, Maple Optical Systems
16.00 Coffee break
MANAGEMENT ISSUES
16.30 Service Level Management in Optical Networks
With the tremendous growth of traffic over the Internet and increased
diversity of traffic types, optical networking has become the choice
for most service providers to handle the volume and meet the diverse
service requirements of the carried traffic. As the diversity of traffic
increases and underlying infrastructure becomes more IP centric, customers
are demanding guaranteed service quality and an accounting from service
providers in form of Service Level Agreements (SLAs) reports. Studying
the Service Level (SLA) requirements of the different types of traffic
being carried over the optical Internet. Proposing strategies to translate
SLA requirements and metrics into network and optical Quality of Service
(QoS) parameters.
Mehmet Toy, Axiowave Networks
17.00 Automatic Switched Optical Networks (ASON) - Functionality
and Architectural Components
Describing the Automatic Switched Optical Network (ASON), an optical
network solutions that provides client-independent OCh level switching,
currently being standardised in ITU-T. Focusing on the major architectural
components such as the control plane of the user network interface
and network node interface, the network topology discovery, traffic
engineering and the resilience mechanisms. Clarifying which functionality
can be performed in the automatic switched OTN and which of them remain
in the OTN-client layers.
Roberto Clemente, Project Leader of EURESCOM project FASHION,
CSELT
17.30 End of Day One
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CONFERENCE
DAY TWO APRIL 12, 2001
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Chairman:
Juan-Manuel Ramos-Gurrion, Director of Broadband Technology,
Bell Canada
09.00 Welcome and coffee
TECHNICAL FOCUS
09.30 Ethernet Metro Networks
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By
Amir Lahat,
Co-founder & Director of Product Management,
Atrica Inc. |
1. Introduction
Metro market trends
The service providers' dilemma
2. Ethernet Technology
Current enterprise Ethernet technologies
New Ethernet developments
Ethernet technology benefits for service providers
3. Metro Networks Challenges for Ethernet Technology
Scalability
SLA delivery
Availability
Maintenance
Provisioning
Management
10.30 Coffee break
11.00
4. Architecture Alternatives for Ethernet Metro Networks
Ethernet over Sonet
Ethernet over lambda
Optical Ethernet
5. Ethernet MANs
Q1/2001 Industry Snapshot
Service providers
Equipment vendors
6. Summary
12.00 Lunch
GIGABIT ETHERNET SESSIONS
14.00 Keynote address
The New Frontiers of Gigabit Ethernet
Identifying the drivers for Gigabit Ethernet
implementation over the last mile. Emphasising on the additional services
GbE will enable and the corresponding revenue streams those new services
will generate. Examining traditional access methods and delivery technologies,
highlighting their inability to provide the services that will proliferate
on the Next Generation Network. Demonstrating how GbE will provide
the reliability, security and restoration needed to deliver these
new services. Illustrating how GbE delivered to commercial and residential
subscribers alike will impact education, medicine, business, entertainment
and daily life. How Fiber-to-the-Subscriber and Gigabit Ethernet provide
the revolutionary solutions to help broadband access providers capture
significant market share in the exploding global broadband marketplace.
Gigabit Ethernet over fiber will be positioned as the defining solution
that will satisfy the vast demand in bandwidth, scalability and longevity,
particularly in the last mile. Summarizing findings from a number
of industry analyst firms providing market projections for residential
GbE gateway access hardware over the next several years.
Bernard Daines, President & CEO, World Wide Packets
SONET/SDH GbE
CONVERGENCE CONDITIONS
14.30 The interest of Ethernet
Interfaces in SDH/SONET Equipment
With the exploding demand of data traffic, carriers are looking for
new solution to integrate IP services in the transmission network.
In fact some of the specific features of routers, such as mapping
and bridging could be handled in a more efficient way by transmission
equipment.
Describing the features that the operator are looking for in order
to deliver IP / Ethernet services.
Demonstrating how depending of the rate (10 to 1000 Mbs), the quality
of service, the security, the distance or the protection mechanism,
SONET / SDH equipment can offer rich & various solutions. ·
Olivier de Nomazy, Marketing Broadband , Nortel Networks
15.00
Determining how SDH
and GbE are Likely to Converge in Next Generation Metro and Access
Networks
Analysing the evolution of network architectures and services to determine
the future role of transmission technologies. Extending the Quality
of Service benefits of SDH into Ethernet packet networks. Examining
the practicalities of deploying GbE over SDH and determining its suitability
for managing the delivery of circuit switch traffic in the MAN Examining
the potential convergence of GbE and SDH in both the access and metropolitan
area network. Will SDH continue to be a viable option after 10Gigabit
Ethernet is mature.
Edward Hopkins, European Product Marketing, Extreme Networks
15.30
Gigabit Ethernet Network and Applications
Benefits of embedding carrier-class
Ethernet within the SDH/WDM infrastructure.
Discussing the difference between enterprise based Ethernet infrastructure
and carrier-class Ethernet infrastructure.
Bringing carrier-class reliability to the Ethernet
Offering carrier-class security for the IP traffic
Seamless integration between the Ethernet management and the SDH/WDM
management
Generating additional revenue source from the Ethernet/SDH/WDM infrastructure
Mr. Yoav Valadarsky, Associate VP, Lightscape Networks
16.00 Implementing Ethernet over Sonet (EOS) for the Delivery
of Carrier Class
Transparent LAN Services
Describing a study conducted in 1998 for the City of Toronto. Based
on the demand for Ethernet based services, Bell Nexxia looked for
alternate solutions for delivering TLS services at 10Mbps, 100Mbps
and 1000Mbps data rates. This study demonstrates the cost effectiveness
and scalability of Ethernet over Sonet when compared to alternate
architectures based on ATM. Describing the access and core alternatives
to collect and carry large amounts of Ethernet traffic from customer
premises.
The challenge is to maintain security levels by means of segmentation
of broadcasts domains using VLAN trunking mechanisms over the high
capacity Ethernet over SONET (EOS) rings. Customers will be allowed
to tag frames using 802.1p bits for CoS identification before entering
into the network. The access and the core networks will be able to
interpret and forward these frames without changing their intrinsic
characteristics. A set of CoS translations will be required to meet
the levels of service across different layer 2 infrastructures in
the access and the core. Detailing an end-to-end architecture model
to build the EOS infrastructure. An example of the first commercial
implementation of EOS in Canada will be provided along with the service
levels agreements and management infrastructure.
Juan Manuel Ramos, Associate Director of Broadband Technology, Bell
Nexxia.
16.30 Coffee break
17.00 DEBATE
Gigabit Ethernet versus SONET/SDH: advantages
and drawbacks
GbE in the WAN
The impact of 10 GE
Technical issues
Chairman:
Juan-Manuel Ramos-Gurrion, Director of Broadband Technology,
Bell Canada
Participants:
Bernard Daines, President & CEO, World Wide Packets
Dr. Gilad Goren, Founder, Chief Executive Officer, Native
Networks Technologies
Anand Parikh, Founder and Vice President of Product Marketing
and Business Development, Appian Communications
François
Tournesac, Director of Business Development, Atrica, Inc.
Edward Hopkins, European Product Marketing, Extreme Networks
Nan Chen, Director of Product Managent & Product Marketing,
Force 10 Networks
Mr. Yoav Valadarsky, Associate VP, Lightscape Networks
18.00 End of Day Two
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CONFERENCE
DAY THREE APRIL 13, 2001
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Chairman:
Juan-Manuel Ramos-Gurrion, Director of Broadband Technology,
Bell Canada
09.00 Welcome and Coffee
ETHERNET OPTICAL ACCESS
09.30 Evolving Optical Access Networks
Describing new "last mile" intelligent optical edge alternatives to
existing TDM-based equipment that provide a migration path to packet-based
optical networking, service-aware and highly tunable new access technologies
that can scale as businesses add users and applications.
Anand Parikh, Founder and Vice President of Product Marketing
and Business Development,
Appian Communications
10.00 Spanning Enterprise LAN over the Public WAN
Although SONET has limitations in addressing the new data-centric
world, it still possesses formidable features - protection, traffic
engineering concepts, OAM and more - that were not duplicated in the
enterprise networks. A new way of delivering services to large customer
base must intelligently include these features coupled with the simplicity
of Ethernet, and a robust network wide management. Describing APT,
a novel net-wise statistical multiplexing technology, that provides
flow isolation and guaranteed QoS per customer on the public network.
These multiplexing algorithms are implemented in Silicon and are capable
of managing thousands of queues providing QoS for thousands of aggregated
flows.
Dr. Gilad Goren, Founder, Chief Executive Officer, Native
Networks Technologies
10.30 Integrated Network Management for Optical Ethernet
Discussing how optical Ethernet technology can now incorporate a cost-effective,
integrated network management system when used for Metropolitan Area
Networking. Showing how advancements in optical Ethernet technology
now allow for end-to-end provisioning to ensure the quality of service
customers pay for with Service Level Agreements (SLA) and how this
technology can provide a reliable network management infrastructure
that rivals that of SONET/SDH.
François Tournesac, Director of Business Development,
Atrica, Inc.
11.00 Coffee break
11.30 Service
Provisioning Capability
Outlining new and more promising optical access solutions that allow
optical capacity now being deployed to be software provisioned across
multiple services, each with distinct service levels, and with the
ability for both guaranteed rates and burstable rates to be remotely
adjusted by software command. How these soft-tunable services could
be provisioned in minutes instead of weeks, with no need for high-cost
truck rolls or on-site upgrades. In addition, such services would
provide the ability to immediately deliver exactly the amount of bandwidth
where it is needed.
Anand Parikh, Founder and Vice President of Product Marketing
and Business Development,
Appian Communications
TECHNICAL ISSUES
12.00 Robustness and Scalability Issues
Focusing on the recent developments in technology that have made Ethernet
a powerful and cost-effective solution for the wide area network and
the steps which are being taken to infuse it with the robustness,
scalability and manageability required for large-scale deployment
in carrier networks.
François
Tournesac, Director of Business Development, Atrica, Inc.
12.30 Lunch
14.00 Voice and VoIP in LAN/MAN Gigabit Networks
Explaining why voice is different than data, the challenge of implementing
voice on high performance MAN/LAN networks and why VoIP is the right
technology to do so. Detailing the different parts of a VoIP infrastructure,
how they compare with the existing PABX system and what type of migration
strategies are available for VoIP implementation.
Peter Derks, VP Sales & Marketing of QuesCom S.A.
10 GIGABIT ETHERNET FUTURE
14.30 10 Gigabit Ethernet Standard Description
Discussing the new 10 Gigabit Ethernet standard. Detailing how 10GbE
will penetrate the MAN and WAN,and hence facilitate new business models
to continue the drive for higher bandwidth and higher revenue opportunities
at the edge of the net.
Bernard Daines, President & CEO, World Wide Packets
15.00 Coffee break
15.30 Examining the Business Case for Deploying Gigabit Ethernet
and the Significance of 10 Gigabit Ethernet in Metropolitan Areas
Identifying the need to migrate towards new metropolitan network technology,
such as Gigabit Ethernet and 10 Gigabit Ethernet.
Examining the appropriateness of deploying Ethernet as a transmission
technology in metropolitan areas in terms of:
Scalability
Cost effectiveness
Provisioning services
Transporting broadband traffic
Resilience and reliability
Edward Hopkins, European Product Marketing, Extreme Networks
16.00 Carrier and Service Provider Applications
Dark fiber interconnect.
DWDM connectivity.
Ethernet aggregation.
IEE.3ae 10 GE task force.
10 GE Alliance objectivs.
Main PMD proposals.
WIS layer SONET framing.
WAN rate adaptation.
Nan Chen, Director of Product Managent & Product Marketing,
Force 10 Networks
16.30 End of the conference
